[ 26.654296] BUG: Bad rss-counter state mm:00000000c0fb37d0 type:MM_FILEPAGES val:33 [ 26.655650] BUG: Bad rss-counter state mm:00000000c0fb37d0 type:MM_ANONPAGES val:22 [ 26.802390] ================================================================== [ 26.803424] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.804576] Read of size 8 at addr ffff88800964d3f8 by task sshd/220 [ 26.805410] [ 26.805624] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.806526] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.807486] Call Trace: [ 26.807809] [ 26.808094] dump_stack_lvl+0x91/0xf0 [ 26.808583] print_report+0xcc/0x620 [ 26.809063] ? __virt_addr_valid+0x102/0x340 [ 26.809618] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.810269] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.810902] kasan_report+0xbe/0xf0 [ 26.811375] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.812006] vma_interval_tree_remove+0xc75/0xec0 [ 26.812600] vma_prepare+0xc54/0x11a0 [ 26.813078] __split_vma+0x5af/0x950 [ 26.813556] ? __pfx___split_vma+0x10/0x10 [ 26.814109] ? find_held_lock+0x2c/0x110 [ 26.814630] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.815191] ? lock_is_held_type+0x9f/0x120 [ 26.815724] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.816331] ? mtree_range_walk+0x632/0x900 [ 26.816875] ? mas_walk+0x5c7/0x7c0 [ 26.817347] do_vmi_munmap+0x1f1/0x2b0 [ 26.817840] mmap_region+0x1f9/0x2660 [ 26.818322] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.818831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.819545] ? __pfx_lock_acquire+0x10/0x10 [ 26.820086] ? __pfx_mmap_region+0x10/0x10 [ 26.820613] ? security_mmap_addr+0x7d/0xa0 [ 26.821151] ? get_unmapped_area+0x1f5/0x3f0 [ 26.821698] do_mmap+0x854/0xf00 [ 26.822158] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.822654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.823224] ksys_mmap_pgoff+0x3af/0x500 [ 26.823732] do_syscall_64+0x3f/0x90 [ 26.824211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.824859] RIP: 0033:0x7fedad750d82 [ 26.825309] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 26.827446] RSP: 002b:00007ffec6084878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.828347] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedad750d82 [ 26.829182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedacb8a000 [ 26.830044] RBP: 00007fedacb8a000 R08: 0000000000000009 R09: 0000000000001000 [ 26.830880] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8f5545ec0 [ 26.831718] R13: 00007ffec6084890 R14: 00007ffec60848c0 R15: 00007ffec6084c20 [ 26.832564] [ 26.832852] [ 26.833068] Allocated by task 213: [ 26.833496] kasan_save_stack+0x22/0x50 [ 26.834022] kasan_set_track+0x25/0x30 [ 26.834516] __kasan_slab_alloc+0x59/0x70 [ 26.835044] kmem_cache_alloc+0x16b/0x370 [ 26.835559] vm_area_dup+0x20/0x160 [ 26.836010] __split_vma+0x170/0x950 [ 26.836479] split_vma+0xc6/0x110 [ 26.836920] mprotect_fixup+0x8d2/0xb30 [ 26.837421] do_mprotect_pkey+0x87e/0xd40 [ 26.837957] __x64_sys_mprotect+0x78/0xc0 [ 26.838481] do_syscall_64+0x3f/0x90 [ 26.838950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.839589] [ 26.839802] Freed by task 213: [ 26.840197] kasan_save_stack+0x22/0x50 [ 26.840697] kasan_set_track+0x25/0x30 [ 26.841188] kasan_save_free_info+0x2b/0x50 [ 26.841715] __kasan_slab_free+0x10a/0x190 [ 26.842259] kmem_cache_free+0x10d/0x4d0 [ 26.842767] rcu_core+0x8c8/0x2860 [ 26.843207] __do_softirq+0x1b7/0x7d4 [ 26.843684] [ 26.843896] Last potentially related work creation: [ 26.844476] kasan_save_stack+0x22/0x50 [ 26.844979] __kasan_record_aux_stack+0x8e/0xa0 [ 26.845542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.846192] remove_vma+0x139/0x170 [ 26.846642] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.847197] do_vmi_munmap+0x1f1/0x2b0 [ 26.847680] __vm_munmap+0x138/0x3a0 [ 26.848141] __x64_sys_munmap+0x59/0x80 [ 26.848634] do_syscall_64+0x3f/0x90 [ 26.849106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.849747] [ 26.849979] Second to last potentially related work creation: [ 26.850652] kasan_save_stack+0x22/0x50 [ 26.851152] __kasan_record_aux_stack+0x8e/0xa0 [ 26.851731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.852365] remove_vma+0x139/0x170 [ 26.852812] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.853360] do_vmi_munmap+0x1f1/0x2b0 [ 26.853851] mmap_region+0x1f9/0x2660 [ 26.854324] do_mmap+0x854/0xf00 [ 26.854749] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.855238] ksys_mmap_pgoff+0x7d/0x500 [ 26.855725] do_syscall_64+0x3f/0x90 [ 26.856195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.856835] [ 26.857051] The buggy address belongs to the object at ffff88800964d3a0 [ 26.857051] which belongs to the cache vm_area_struct of size 168 [ 26.858527] The buggy address is located 88 bytes inside of [ 26.858527] freed 168-byte region [ffff88800964d3a0, ffff88800964d448) [ 26.859914] [ 26.860129] The buggy address belongs to the physical page: [ 26.860790] page:0000000068c72bab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x964d [ 26.861866] memcg:ffff88800ed69601 [ 26.862290] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.862978] page_type: 0xffffffff() [ 26.863422] raw: 0100000000000200 ffff88800879fc80 ffffea0000365cc0 dead000000000005 [ 26.864338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed69601 [ 26.865240] page dumped because: kasan: bad access detected [ 26.865899] [ 26.866118] Memory state around the buggy address: [ 26.866702] ffff88800964d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 26.867557] ffff88800964d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 26.868403] >ffff88800964d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 26.869244] ^ [ 26.870094] ffff88800964d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.870944] ffff88800964d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.871795] ================================================================== [ 26.872747] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.082242] BUG: Bad rss-counter state mm:000000005dc4353d type:MM_FILEPAGES val:33 [ 29.083383] BUG: Bad rss-counter state mm:000000005dc4353d type:MM_ANONPAGES val:22 [ 29.516446] BUG: Bad rss-counter state mm:0000000062e3b61e type:MM_FILEPAGES val:33 [ 29.517430] BUG: Bad rss-counter state mm:0000000062e3b61e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15626' (ECDSA) to the list of known hosts. 2023/06/20 08:40:07 fuzzer started 2023/06/20 08:40:07 dialing manager at localhost:44161 2023/06/20 08:40:07 checking machine... 2023/06/20 08:40:07 checking revisions... [ 30.117012] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:40:07 testing simple program... [ 30.155927] cgroup: Unknown subsys name 'net' [ 30.203119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:40:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fbdd5a64dad RCX=0000000000000000 RDX=ffff888019369b40 RSI=ffffffff813a0ab6 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff8880190b74d0 R8 =0000000000000006 R9 =00007fbdd5a64dad R10=ffffffffffffffff R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888019369b40 R15=ffff88800daf9480 RIP=ffffffff814c081b RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbdd5422700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd4820750b0 CR3=000000000e372000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037303a3034 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383732 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f4d59691c70 CR3=000000000f1d0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=55d3d6338f7962b7994c3b165714d3cf XMM02=2c67c8bc2e329bc3000000000011fd88 XMM03=fb795ef6d65770560000000000123a30 XMM04=4b63f387affc366b00000000000ae988 XMM05=670a8c4f8edde2160000000000135050 XMM06=4fda316b135da52b00000000001347c0 XMM07=e042d86d42eb936e0000000000123cb0 XMM08=fd991f375a1a5a53000000000011fde8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000